From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-230975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 32146 invoked by alias); 29 Sep 2007 17:56:00 -0000
Received: (qmail 32131 invoked by uid 48); 29 Sep 2007 17:55:50 -0000
Date: Sat, 29 Sep 2007 17:56:00 -0000
Subject: [Bug c++/33589]  New: [4.3 regression] ICE on valid code at -O2: verify_flow_info failed
X-Bugzilla-Reason: CC
Message-ID: <bug-33589-14817@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "a dot chavasse at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2007-09/txt/msg02423.txt.bz2

g++43 -v output:

Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc/configure --program-suffix=43 --disable-multilib
--enable-languages=c,c++
Thread model: posix
gcc version 4.3.0 20070929 (experimental) (GCC)

Built from svn trunk, revision 128885


Compiling this with -O2 or -O3 fails with the following message:

verify_flow_info_failed.cpp: In function 'void somefunction()':
verify_flow_info_failed.cpp:29: error: BB 2 last statement has incorrectly set
region
verify_flow_info_failed.cpp:29: internal compiler error: verify_flow_info
failed


struct base
{
        void somemethod() {}
};

struct derived : public base
{
};

struct smartpointer
{
        ~smartpointer()
        {
        }

        operator derived*() const
        {
                return 0;
        }
};

typedef void ( derived::* methodptr_type )();

methodptr_type getmemberptr()
{
        return &derived::somemethod;
}

void somefunction()
{
        smartpointer pObj;
        ( pObj->*getmemberptr() )();
}


-- 
           Summary: [4.3 regression] ICE on valid code at -O2:
                    verify_flow_info failed
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: a dot chavasse at gmail dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33589